update release date for 12.4 and dev (javadoc)
diff --git a/meta/netbeansrelease.json b/meta/netbeansrelease.json
index 6bf96f7..b7c5074 100644
--- a/meta/netbeansrelease.json
+++ b/meta/netbeansrelease.json
@@ -431,9 +431,9 @@
             }  
         },
         "releasedate": {
-            "day": "-",
-            "month": "-",
-            "year": "-"
+            "day": "19",
+            "month": "05",
+            "year": "2021"
         },
         "previousreleasedate": {
             "day": "03",
@@ -459,8 +459,8 @@
             "year": "-"
         },
         "previousreleasedate": {
-            "day": "03",
-            "month": "03",
+            "day": "19",
+            "month": "05",
             "year": "2021"
         }
     }